js only first char code example

Example 1: how to get the first character of a string in javascript

let str = 'John Wick'
let firstChar = str.charAt(0) 
console.log(firstChar); // "J"

Example 2: javascript only allow show first few characters from a string

var string = 'Hey, I am good';
string.substring(0,3); // show first 3 characters
//result "Hey"